# author: Lux YAO

for i in range(10):
    print('loop ', i)

# 打印0-10之间的数字，步进值为2
for b in range(0, 10, 2):
    print('loop ', b)

real_age = 33
for a in range(3):
    guess_age = int(input('guess age:'))
    print('your age is ', guess_age)
    if guess_age == real_age:
        break
else:
    print('you try too many times')